Showing papers in "Nuclear Instruments and Methods in Physics Research in 1983"

TL;DR: In this paper, a direct γ-ray instrumental analysis of 210Pb in sediment samples is presented, where the dependence of self-absorption on sample composition is solved by making a direct transmission measurement on each sample.

TL;DR: In this article, a BaF 2 crystal coupled to a XP 2020 Q photomultiplier with quartz window was used as a scintillator for light pulse shape investigation.

TL;DR: In this article, the authors proposed a method of obtaining colliding γe and γγ beams with high energies and luminosities using the designed linear accelerators VLEPP and SLC with colliding e + e − beams at the energies 2 E ≳ 100 GeV.

TL;DR: In this paper, when moderate disorder is present, the cumulant expansion/ratio method approach to EXAFS data analysis offers an attractive alternative to nonlinear least-squares fitting of the data Analysis by nonlinear fitting, moment expansion, and Cumulant Expansion are compared, and useful formulae are derived kdependent mean free path is also treated

TL;DR: In this article, the upper limit of peak area in a multi-channel spectra with a known significance level is determined. But the problem is solved exactly and, thus, the results are valid in experiments with small numbers of events.

TL;DR: In this article, the parameters defining the optical design for X-ray scattering and diffraction experiments with synchrotron radiation are derived and the various approaches are reviewed and a few selected examples illustrate the advantages of synchoretron radiation methods for various applications on poorly ordered systems.

TL;DR: In this article, the dependence of the resolution/sensitivity of computerized X-ray transmission tomography is examined as a function of the photon energy, and the optimum condition which minimizes the time to scan a section at a given resolution/Sensitivity, is that μ = 2/D, where μ is the linear attenuation coefficient and D is the specimen diameter.

TL;DR: In this paper, a new type of sputter negative ion source was developed in which the sputter target and the surface ionizer are enclosed in a common chamber containing cesium vapor.

TL;DR: In this paper, the authors measured the response to high-energy particles of a 20 μ pitch strip detector as a function of applied voltage and magnetic field and proposed a detector with optimized spatial resolution.

TL;DR: In this paper, a demagnifying focusing mirror-monochromator optics has been designed and constructed for time-resolved X-ray diffraction studies of biological substances.

TL;DR: In this paper, gold coated silicon substrates were irradiated with filtered and unfiltered synchrotron radiation under varying conditions and the thickness of the contaminant was measured with a VUV reflectometer through the observation of interference structures.

TL;DR: A review of the basic performance and technology of plastic streamer tubes is presented, together with their applications and developments essentially in the field of digital tracking calorimetry, based on either digital patters or charge readout, or both, with different pick-up electrode arrangements as discussed by the authors.

TL;DR: In this article, a new technique for measuring 10B concentrations of ppm order in tissue has been developed by using 10B(n, α)7Li∗ prompt gamma-ray spectrometry.

TL;DR: In this paper, high precision nuclear reaction resonance width measurement techniques were applied to the 429 keV resonance in 15N(p, αγ) 12C yielding a result which may be stated at present as: Γ=120±30) eV.

TL;DR: In this paper, a basic model is described which explains the initialization and the growth of the pseudo-spark discharge process in two phases, and the discharge characteristics of single-gap and multigap pseudo spark chambers have been investigated.

TL;DR: In this paper, a semi-empirical formula for the thermal diffuse scattering cross-section as a function of materials constants, temperature, and neutron energy is given, in the range 10−5 < E < 10 eV.

TL;DR: In this paper, a computer code named URMEL is described which calculates resonant modes of any azimuthal mode number m = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

TL;DR: In this article, a telescope consisting of six silicon microstrip detectors achieving 5 μm spatial resolution for minimum ionizing particles has been built, and the design and fabrication of the counters, electronics, and mechanical set-up is described, and first results of its performance in a 175 GeV/c beam are reported.

TL;DR: In this paper, the authors used a thin carbon foil and a micro-channel plate as a start detector and a Si detector as a stop detector, which gave a time resolution of 250 ps fwhm for 5.48 MeV alpha particles.

TL;DR: In this article, the emission characteristics of LMIS are discussed in terms of a field evaporation/postionization mechanism, and the best focused beam performance, i.e. maximum target current density for a specific beam size, is generally achieved at the lowest possible value of total current.

TL;DR: In this article, a structural difference rule is formulated according to which an amorphous binary alloy film is formed by ion mixing of multilayered sample when the two constituent metals are of different structure, apparently independently of their atomic sizes and electronegativities.

TL;DR: In this paper, the effect of radiation damage on the refractive index of LiNbO3-crystals was investigated and the authors showed that up to 30% of the Nb-atoms are distributed on vacant octahedral lattice sites and that the change of the physical properties can be divided into three regions of the damage.

TL;DR: In this article, a 2-dimensional charge-coupled device (CCD) was used for detecting high-energy particles with high precision and excellent 2-track resolution, achieving an accuracy of 98±2% per plane and spatial resolution of 4.3 μm and 6.1 μm in two orthogonal directions.

TL;DR: In this paper, the idea of using a thin multiwire chamber with thick wires as a possible sampling detector for calorimeters was checked out in practice, and two small test detectors with gas sample thickness of 2 and 3 mm were constructed and tested in the laboratory.

TL;DR: In this article, a review of the growth and fabrication of mercuric iodide is presented, especially with respect to the spectral response of detectors with thicknesses of 1 cm or more.

TL;DR: In this article, the formation and evolution of radiation damage due to room-temperature Bi implantation in Si at keV and and200 keV was studied during implantation and annealing via in situ transmission electron microscopy (TEM) using the newly developed facility at Orsay.

TL;DR: In this article, a new type of spectrometer for the investigation of nuclear structure at high angular momentum and of the mechanisms of heavy-ion induced reactions is reported, consisting of 72 NaI(Tl) detectors closely packed in a 4π arrangement.

TL;DR: In this article, a new ion source was described which typically generates 1 to 2 μA of 27Al− ions from small samples (≈4mg) of Al2O3 with an ionization efficiency of about 0.25%.

TL;DR: In this article, a spectrometer for X-ray diffraction and refraction studies of horizontal, free surfaces of liquids is described, and a layering at the surface of a liquid crystal is presented.